The Department of Transportation (DOT) has approved Alaska Air Group (AAG), the parent company of Alaska Airlines and Horizon Air, to acquire Hawaiian Airlines' certificates, international services, and codeshare approvals. The merger between Alaska Airlines and Hawaiian Airlines was finalized in September 2024.  

On July 14, 2025, the DOT authorized AAG to take over Hawaiian Airlines' economic authorities and transfer existing approvals between the two airlines. The decision followed a December 2023 announcement that AAG would acquire Hawaiian Airlines' shares for $1.9 billion, including $900 million in debt. In July 2024, the airlines requested DOT approval for the transfer, with no stakeholder objections.

The airlines argued that the transfer aligns with DOT precedent and public interest, enabling the combined entity to serve 54.7 million passengers annually across 138 destinations, including 29 top international markets. Hawaiian Airlines customers will gain access to Alaska Airlines' Mileage Plan and over 1,200 destinations via the oneworld alliance. The merger will also increase competition in the U.S. domestic market, where the Big Four airlines hold 80% of the share, and on international routes, offering lower-fare options.

Additionally, the airlines emphasized that the merger will maintain their ownership structure and generate $400 million in synergies within two years. Employees will benefit from improved salaries and benefits, with Alaska Airlines committed to preserving Hawaiian Airlines' brand and interisland services.Hawaiian Airlines currently holds approvals to operate flights to Open Skies countries, Papeete (PPT), Tokyo Haneda (HND), and codeshare agreements with airlines like Japan Airlines, Air China, and Virgin Australia. 

Alaska Airlines has codeshares with Air Tahiti Nui, Icelandair, and others. Post-merger, Alaska Airlines launched flights from Seattle (SEA) to Tokyo Narita (NRT) in May 2025, with plans for Seoul (ICN) in September 2025 and Rome (FCO) in May 2026, using a Boeing 787-9 Dreamliner.